5-Formylisoxazole-3-carboxylic acid CAS 221173-23-5

Description

Compared with other compounds in its class, the molecular weight of 141.08 g/mol gives 5-Formylisoxazole-3-carboxylic acid distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

5-Formylisoxazole-3-carboxylic acid (CAS 221173-23-5), molecular formula C5H3NO4 and molecular weight 141.08 g/mol, is a CATO reference standard with documented purity and traceability.

Based on its molecular formula C5H3NO4, 5-Formylisoxazole-3-carboxylic acid contains a carbohydrate-derived structure, an amide group; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 141.08 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.

This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.

CATO manufactures 5-Formylisoxazole-3-carboxylic acid under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.

Physical & Chemical Properties

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